BladeRF 2 in GRC3.8

Hello everyone,

at the moment, I'm trying to connect a BladeRF2 to GNU Radio Companion, using the Osmocom block (in Ubuntu). 

This appears to be more difficult than I thought: I could do it in GRC3.7, but for some reason I can't pull it off in GRC3.8.

After a bit of Googling, I get the impression that others have struggled with this before, but I couldn't really find a solution.

Does anyone know if it is still possible to connect a BladeRF2 via Osmocom to GRC3.8? Or do I have to find another solution? 

Thanks for your help!

Jerom Maas